All‐Conjugated Polymer Core–Shell and Core–Shell–Shell Particles with Tunable Emission Profiles and White Light Emission

Abstract

The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/smll.202101411. on Suzuki-Miyaura-type cross-coupling are investigated. The different approaches allow accurate control over the created interface between the conjugated polymer phases and thus also over the energy transfer phenomena between them. This approach opens up completely new synthetic freedom for fine tuning of the optical properties of CPP, enabling, for example, the synthesis of individual white light-emitting particles.

Red-Fluorescing Paramagnetic Conjugated Polymer Nanoparticles─Triphenyl Methyl Radicals as Monomers in C–C Cross-Coupling Dispersion Polymerization

“…The ratio of radical to the other monomers does not influence the emission color of the CPNs substantially (see Figure d). CPNs tend to exhibit lower ϕ compared to their monomers due to unavoidable quenching within the closely packed structure of the particles . While our monomers exhibit ϕ of 23–32%, the CPNs in 1-propanol made from both monomers, oct-CzBr 2 -TTM and bisoct-CzBr 2 -TTM , exhibit increasing ϕ between 0.7 and 5.3% when raising the radical monomer ratio from 10 to 50 mol %.…”

“…CPNs tend to exhibit lower ϕ compared to their monomers due to unavoidable quenching within the closely packed structure of the particles. 44 While our monomers exhibit ϕ of 23−32%, the CPNs in 1-propanol made from both monomers, oct-CzBr 2 -TTM and bisoct-CzBr 2 -TTM, exhibit increasing ϕ between 0.7 and 5.3% when raising the radical monomer ratio from 10 to 50 mol %. These values are therefore among the best for red-emitting radical nanoparticles and only second to the very high value reported for nanoprecipitated Cz-TTM nanoparticles stabilized using block copolymers.…”

“…These values are therefore among the best for red-emitting radical nanoparticles and only second to the very high value reported for nanoprecipitated Cz-TTM nanoparticles stabilized using block copolymers. 16,44 2.3. Photoluminescence Decay and Stability.…”

Red-Fluorescing Paramagnetic Conjugated Polymer Nanoparticles – Triphenyl Methyl Radicals as Monomers in C-C Cross-Coupling Dispersion Polymerization

“…CPNs tend to exhibit lower  compared to their monomers, due to unavoidable quenching within the closely packed structure of the particles. 44 While our monomers exhibit  of 23 -32%, the CPNs in 1-propanol made from both monomers, oct-CzBr2-TTM and bisoct-CzBr2-TTM, exhibit increasing  between 0.7 -5.3% when raising the radical monomer ratio from 10 to 50 mol%. These values are therefore among the best for red emitting radical nanoparticles and only second to the very high value reported for nanoprecipitated Cz-TTM nanoparticles stabilized by block-copolymers.…”

“…These values are therefore among the best for red emitting radical nanoparticles and only second to the very high value reported for nanoprecipitated Cz-TTM nanoparticles stabilized by block-copolymers. 16,44 Photoluminescence Decay and Stability. Since conventional CPNs are less prone to photobleaching compared to particles loaded with commercial dyes, 26 we believe that this feature is also preserved for our radical-dye containing particles.…”